Have you messed with one yet? All 1D series except the 1D M4 have pretty crappy and small LCD screens. Even the current full frame 1DS MarkII has a smallish LCD.

The controls on all 1D series take some getting used to versus the regular Canons since there is no dial to switch from A to Tv, etc... I would probably opt for something newer myself. The 1D MII maxes out at ISO1600 with H being 3200. "H" would mean unacceptable noise levels where I used to shoot a 50D at ISO3200 with decent results. I would think a 50D would be a better overall camera and I think a 7D would absolutely trounce it.